Valve-locking device



May 28, 1929. P Q DOUGLAS 1,714,856

VALVE LOCKING DEVICE Filed DGO. 19, .1927 4f Z5 5/ //f /727 2? 3'@ 72glu/1 j ATTORNEY UNITED sra'ras PAISLEYS. DoUGLAs, or` DALLASCOUNTYQTEXAS, assieivon ori oivnfiinLF To' WL is.`

Patented May 28, 1929. l

, ROBINSON AND-.ONELFOURTH To G. YR. DOUGLAS, Bo'rH"onnaLLAsfrExAsj yVALVE-LOCKING fnnvien.

Application flied December i9, i927. seiiaiivofeiipsa This invention`relates to new and useful improvenients'invalve locking devices.

The `invention has to doY with devices for vlocking valves `eitherfopenor closed `or partially. so'a'nd particularly to the fastening of thehand wheel or equivalent member against operation.` K

Onev object-of the invention is to provide a device which may bedetachably or permanently secured to a valve casing and locked inengagement with the hand wheel, whereby said wheel is secured againstrotation, thus preventing manipulation of the valve stem.

A further object of the invention is to provide a device which will alsocover the cap nut which holds the hand wheel on the valve stem andthereby prevent tampering with saidnut. Y

' A construction designed to carry out the `,in-Ii. vention will behereinafter described,-together with other features of the invention.

The invention will be more readily understood from a. reading of thefollowing specification andby reference to the accompanying drawings, inwhichl an example of the invention is shown andwherein:

Fig. 1 is an elevation of the `upper portion of a gate valve equippedwith a locking device constructed in accordance with the invention,partions also being in section,

. Fig. 2 is a plan view of the same,

Fig. 3 is a cross-sectional view on the line p 3 3 of Fig. 2, and,

Fig. 4 is an elevation showing another form of the invention, thelockingbarbeing shown elevated in dotted lines. f l

In the drawings the numeral lQpdesignates ,the bonnet of a gate valve11. It is the usual practice to'provide such bonnets with a flange f l12yto which the flange 13 of a stuffing box 14 is secured by bolts 15.Tlie'usual valve stem 16 extends upwardly from the Vstuffing box and ahand wheel 17 is fastened onthe stem by a cap nut 18. Valves of thistype are in common use in pipelines which conduct oil from the oilfields, but it is to be lunderstood the invention is not to be `limitedtol sucli valves or to suchuse.

In the practice to fasten the hand wheels by means of a lock and chain,but this leaves Y Athe capnut exposed so that one only has'to removethecap nut, lift off thewheel and turn the stem-with a wrench."

In 'order toapply the lock-ing device to valves which. are alreadyinstalled, .the'same 'Y n Fig, 41 liavelshownyanetlieryfer maybe Securedto the box 14. l-'Thisfniaybe earsui carica;

done by welding or otherwise securing the de- Y. vice to the said boxand-substituting` tliesefparts for the box onthevalve, the removed boxbeing used in assembling another def vice.y I have fouiidjit practicalto 'form a supporting yoke byv attaching the lower ends of upwardlyinclined arms 19 and 20,respectively, to diametrically opposite sidesofthe f :flange 13 of thefbox 14. -f v y It is obvious that thesea'rmsmay be given-4, ,any suitable inclinationy and mayfvary 'inf' height;however, theyv must extend beyondVVV the rimof the wheel 17 ,as is shownin Fig. 1.

The upperend of the arm 19 is provided with. ears 21 for receiving theVear 22 ofthe cap bar 23. The ears are connected Vby'a hinge The majorportion ofthe vbar is Vvhorizontal having a rdependingflug 25- at`onefend to which the ear 22 is attached.v

:pin ai, whereby ai@ tareas-hinged tothe arm 19 adJacentone sidefoftliewheel A17.

Wardly curved hasp 126 is provided. This'v hasp receives a reducedtongue 27 on the upper endl of the arm 20 and said tongue isV providedwith an aperture 28 for receiving a 1 i padlock 29 whereby the cap baris securechl in place.l Itis obvious that any meansof locking the member23 to the arm 20 could be used.

An important featurekiis a bossoir'cap 30 provided in the 'center of thebarv23 andhav- Y. i

receiving the cap. nut18 so .that when .the

'ing a recess or cavity 31 in its underside v.forV 90.

'bar is vfastened the "nutsis coveredand con-L cealed.

To prevent .rotation of tliellhand wheel 17 tli'erbar 23 is providedwith 'afpairl Y of depending Apins 32- engaging between .the spokes `ofthe wheel on opposite sides of the head thereof.v The lower ends ofthese pins areinwardlybevelledat 33 so as to vfacilitate the Aentry rofsaid pinsbetween theA spokesv when the cap-bar is swung. Itis importantthat these pins come as .fclose as possible to the hubof the wheelandthe bevelled ends are important'so as-to permitrtliey pins to clearthe' wheel whenthe loarisswung. y

It is obvious that with the pins engaging between the spokes the wheelcan-not be rotated... It is important that thecap 30 adequately coverthe nutj18 andthe lock'29 Will prevent sufficient Ylifting of uit bar:23 Y f to iveaccess to said nut. p

wl'iichl-arinel" land 20', similar to the arms Y 19 and 20, aremadeintegralWit-h the bonnet "170. This form is used when the device is llof yoke,comprising opposite upright arins eX- tended .beyond thelperiphery oi the hand Wheel 0f a Valve7V a rectilinear vcap bar pivotedat Vone end to one arm and having a locking connection Wirth the other`arm of the yoke, and a depending. projection from said bar at one sideof its longitudinal `cen- Jfer for `engaging between the spokes of saidhand Wheel.V c c 2. ln a'locling 'devioe for a hand Wheel,V

an attaching yoke provided"With-oppostely inclined arins extended frombelow the hub of the Wheel outwardly beyondthe'periph-- ery thereof, acap bar `extending parallel to and above the Wheel in *ContactV with itshub its opposite end removably connected lo the other arm, and a pai-rof allnejd pinsrrdependf lngroin the bar and having-ih'elr lowerjfaces'beijeled radially outward from the Wheel hub L to closely lit over ellehub and engage-between the spokes' of said hand Wheel.

. and pivoted at one'endtoone arm and having f i v 35 VIntestinionyfwhereof Iax inysignature. Y

f PAIISLEY fsf DOUGLAS, i y

